Home / 3,086.89-4,259.91-1,689.64

Finding the Fourth Proportional to 3,086.89, 4,259.91 and 1,689.64

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Solution

The fourth proportional to 3,086.89, 4,259.91 and 1,689.64 is: 2,331.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,086.89 : 4,259.91 = 1,689.64 : x
  2. Step 2: Convert to fraction form
    3,086.89/4,259.91 = 1,689.64/x
  3. Step 3: Cross multiply
    3,086.89x = 4,259.91 × 1,689.64
  4. Step 4: Simplify right side
    3,086.89x = 7,197,714.33
  5. Step 5: Solve for x
    x = 7,197,714.33/3,086.89
  6. Step 6: Final answer
    x = 2,331.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.